I'm sure they do but every now and then they click "view ignored content" just in case. There was a frequent poster who allegedly was ignoring him but occasionally will read me and replied making it clear he only read what I wrote because of a buddy sent him a PM... etc.
I ignored my troll briefly but it wasn't a choice and facing him was a better choice to expose his true nature. He got back recently to the forum and left again, same personal attacks but this time he claimed to have "receipts" of my actions... He'll be back anyways!
I couldn't agree more, they need to tell the world who they're allegedly ignoring yet occasionally reading...
I know I'm ignored by 2 posters, one of them conservative and bias, the other one constantly kept on quoting me for no reason arguing about minimalistic things. I consider being ignored by them a blessing.